Actually, even if San Niang hadn't mentioned it, Changhe had already planned to visit the market.
Because it wasn't just any food or water that Hongling had asked him to bring, she could easily rob a caravan and make do for a few days, carrying too much would only be cumbersome. The food and water were meant to be Changhe's own supplies.
The supplies Hongling needed him to bring were more about medicines and dark weapons as consumables, all of which had already been used up; a good bow would be best for this environment, she had taken one when she left but it had broken early on; she also wanted him to bring some clothes, as she was down to her last set, which even had slight tears and had gone stale.
Clothes were something Hongling would never ask anyone else to bring, but it seemed like it was okay since it was Changhe.
As Changhe wandered the market, he still couldn't help feeling that Hongling was truly remarkable.